Fix comments in Dockerfile

[Naramsim]

I leave here another time the instruction to run it.

docker build -t slackemon .
docker run -p 80:80 -v ${PWD}:/var/www/html -it --rm --env-file ./.env --name slackemonInstance slackemon

I'm on windows, so ${PWD} gives me the absolute current path of my drectory. On linux you have to change it.

Additionally, you can fire a new shell and inspect slackemonInstancewith:

docker exec -it slackemonInstance bash